UV printing can ensure you art and environmental protection
The selection and use of photoinitiators in UV-LED curing has also attracted more and more attention. First, choose a photoinitiator whose absorption peak matches the emission spectrum of the light source. It can be seen from Table 1 that the emission spectrum of the UV-LED light source is between 360-405nm, with the highest intensity at 365nm, 375nm, 385nm, 395nm, and 405nm, which belong to the long-wave region, and long-wave photoinitiators should be used first. After further testing, several photoinitiators with the highest absorption rates were found at 365nm, 385nm, and 395nm wavelengths. In terms of efficiency, DETX and EMK are the best photoinitiators for UV-LED light sources. The specific test results are shown in Table 5, Table 6, and Table 7.
One of the solutions:
Look for photoinitiators with stronger absorption and more stable photoinitiators. In terms of efficiency, we have found two good photoinitiators to solve the problem of UV-LED curing.
Ⅳ. Refond offset printing curing UVA full spectrum system light source installation cases:
Refond Optoelectronics’ purple light technology uses its LED packaging technology advantages, adopts multi-chip eutectic integration (low thermal resistance) and vacuum packaging and other patented technologies, and combines the strengths of secondary optical design to create ultra-high UV light power output Offset curing light source system! So as to replace the traditional mercury light source, it is applied to the light source transformation project in the offset sheet-fed printing machine. Because of its many advantages such as power saving and environmental protection, it has gradually gained the recognition and favor of the printing industry!